Concrete insert



w. E. WHITE. CONCRETE INSERT.

APPLICATION lLED FEB. l5. 192!- Patented Mar. 28, 1922.

l iillllil* c i i;

WILLIAM E. WHITnoI cIIIcaeo, ILLINOIS.

CONCRETE INSERT.

in concrete work, and particularly to a novel insert of the kind employed for securing fastening bolts for hangers and similar devices to ceilings.

One of the objects of my invention is toprovide means for accommodating a bolt head in position with capacity-for a maximum of longitudinal adjustment in devices of minimum size. I am aware of the use of numerous devices having the objects in view of providing for the insertion and removal of a bolt or bolt head together with means preventing the accidental removal thereof.v

In each case, however, the construction has been such as to limit the effective usefulness of the device in some particular. It has been found in practice that to attempt to utilize any insert in which loose parts are employed, and in which the loose element must be inserted after the insert is located in position, is unsatisfactory, particularly for the reason that workmen do not readily adapt themselves to the manipulations required, the parts become loose or separated, and subsequent users findv diiiiculty in understanding or adapting themselves to the intricacies of operation. In those devices in which no separate part is employed but in which the entrance opening for the bolt head is of less width than the bolt head, the bearing sur-- face for the. head when ina vertical position and in an adjusted position which necessitates the head occupying a position above the entrance opening, is limited and the strain exerted on the holding flanges is too great.

In my device I have provided a loose holding member which, however, is installed when the parts are manufactured and remains with the insert under all conditions. It is in the form of a keeper of generally U- shape whichv operates in a vertical guideway which permits it to be raised when the bolt is inserted and to resume its lowermost position by gravity when the bolthead isl slid out fromY under it. lThereafter the bolt may slide from end to end of the bon and have a full bearing in whatever position it Specification of Letters atent. Patented llItl.. 28, 1922. Application filed February 16, 1921.

Serial No. 445,314.

is located. Not only this but the keeper and the supporting flanges thereof are so designed that there is no bending strain eX- erted on any portion of the keeper.

The invention will lbe more readily understood by reference to the accompanying drawings, wherein,

Fig. 1 is a' longitudinalv sectional view showing the device of my invention in operation;

Fig. 2 is a sectional view on the line 2-2 -of Fig. 1;

Fig. y3 is a sectional view on the line 3 3 of Fig. 1; and

. Fig. 4 isa perspective view of the keeper which I employ.

In the drawings it will be seen that I provide a boX'consisting of side walls 10, end walls 11 and top wall 12.` Projecting from the top wall is a ribbed anchor member 13, having a terminal enlargement 14, and intermediate webs15, for a well known purpose.

The boX is provided in its lower surface with an open slot, the portion 16 of which is of a width only slightly greater than the diameter of the shank 17 of a -bolt to beaccominodated therein. The portion 18 of the slot is of a width slightly greater than the width of a standard bolt head 19. The latter slot is of a length substantially equal to its width whereby the bolt head may be inserted with the bolt in a vertical position, as shown by dotted lines in Fig. 1. The metal 20, which adjoins the slot 16, acts as a flange or support for the bolt head and the size of the cavity above the flange is such that the head cannot rotate whenz in position. The metal 21, which surrounds the opening 18` constitutes'a flange which is narrower than the flanges 20 and serves as a support for the keeper 22, best shown in Fig. 4. This member is of U-shape, the opening 23 within which is of substantially the same shape as the opening 16 in the body of the insert. The keeper is supported at its sides and one end upon the flanges 18, and is of suiicient thickness to furnish a rigid support for the bolt head. The keeper is retained in the position shown in the drawings by means of vertical ribs 24, which are spaced apart suiiiciently to permit the bolt head to pass readily therebetween.

The bolt is inserted in the following manner. Assuming that the insert has been molded in a body of concrete as shown in Fig. 1, with the bottom of the boX flush with llO the lower surface of the cementitious material, a bolt is placed vertically `and raised to the position shown in dotted' lines in Fig. 1, whereupon it is moved toward the left of the slot 16, and the keeper will drop to the full line position of Figs. 1 and 2. Thereafter Van inclined position and permitted to drop into place. Means may also be provided for temporarily retaining the keeper in the box when the devices are shipped. The manner of securing the insert in position on a form and a clip for retaining` the keeper in a desired position are illustrated in my co-pending application, .Serial'No 445,315, filed of even date herewith.

Obviously the exact form and arrangement of the parts is not essential but I do not wish'to be limited except Vas indicated in the appended claims.

I claim:

1. A concrete insertl comprising in combination, a box having a keyhole slot in its bottom wall, a verticalrib internally of said box, said rib being located on a side wall adjacent to the junction of the enlarged and contracted portions of the keyhole slot, and a U-shaped` keeper adapted to be accommodated in the space abovethe enlarged portion of the slot and to be freely movable vertically and be guided by the surrounding walls and said rib.

2. A concrete insert comprising in combination, a box having in its bottom wall a slot one portion of which is widened relativeV to the remainder, `vertical guiding elements in said box adjacent tothe widened portion of the slot, and a U-shaped retainer loosely mounted in the space above said enlargement and Vadapted to be moved vertically' and held in its proper position by said guidingV elements.

3. In an insert, the combination of a box adapted to be molded in concrete, said box having a slot in its bottom wall, the slot having a relatively widened and a contracted portion, the widened portion being of a size to permit the insertion of a bolt head, guiding means located internally of the box and arranged vertically adjacent to the widened portion ofthe opening, and a keeper adapted to be retained in the space above said enlarged openinga-nd to be guided by said guiding elements when moved vertically, said keeper` when in itsl operativeposition providing a slot of substantially the width and which forms a continuation of the contracted portion of said slot.

4. An insert for concrete work, comprising in combination, a box khaving in its lower wall aslot provided with a relatively contractedand enlarged portion, flanges being arranged tosurround both said portions of the slot, vertical guiding elements arranged internally of the box at a position adjacent to the enlarged opening, and a U- shaped keeper adapted to rest upon ,the flanges adjacent to the enlarged' opening and to be guided in its vertical movement by said guiding elements. Y

5. An insert for concrete comprising in combination, a box havinga keyhole slot in its bottom` wall, inwardly projecting flanges being: arranged; on three sides of the enlarged portion of' said slot,fand a U-shaped keeper mounted in the enlarged 'opening and adapted to rest upon saidflanges. Y

6. An insert for .concrete comprising in combination, a box having a keyhole slot in its bottom wall, inwardly projecting fianges being arranged onl three sides of the en`- larged portion of said slot, and aV U-shaped keeper mountedv in the enlarged opening and adapted to rest upon said fianges, the keeper being supported by flanges on three sides thereof and beingl so arranged that the opening therein forms a continuation of the narrow portion of said slot.

Signedat Chicago, Ill., this 4th day of February, 1921.

, Y W'ILLIAM E. WHITE. 

